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</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">&#160;&#160;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a>&#160;&#183; <a href="classes.html"><font color="#004faf">All Classes</font></a>&#160;&#183; <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QErrorMessage Class Reference<br /><sup><sup>[<a href="qtgui.html">QtGui</a> module]</sup></sup></h1><p>The QErrorMessage class provides an error message display
dialog. <a href="#details">More...</a></p>

<p>Inherits <a href="qdialog.html">QDialog</a>.</p><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qerrormessage.html#QErrorMessage">__init__</a></b> (<i>self</i>, QWidget&#160;<i>parent</i>&#160;=&#160;None)</li><li><div class="fn" /><b><a href="qerrormessage.html#changeEvent">changeEvent</a></b> (<i>self</i>, QEvent&#160;<i>e</i>)</li><li><div class="fn" /><b><a href="qerrormessage.html#done">done</a></b> (<i>self</i>, int)</li><li><div class="fn" /><b><a href="qerrormessage.html#showMessage">showMessage</a></b> (<i>self</i>, QString&#160;<i>message</i>)</li><li><div class="fn" /><b><a href="qerrormessage.html#showMessage-2">showMessage</a></b> (<i>self</i>, QString&#160;<i>message</i>, QString&#160;<i>type</i>)</li></ul><h3>Static Methods</h3><ul><li><div class="fn" />QErrorMessage <b><a href="qerrormessage.html#qtHandler">qtHandler</a></b> ()</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QErrorMessage class provides an error message display
dialog.</p>
<p>An error message widget consists of a text label and a checkbox.
The checkbox lets the user control whether the same error message
will be displayed again in the future, typically displaying the
text, "Show this message again" translated into the appropriate
local language.</p>
<p>For production applications, the class can be used to display
messages which the user only needs to see once. To use
QErrorMessage like this, you create the dialog in the usual way,
and show it by calling the <a href="qerrormessage.html#showMessage">showMessage</a>() slot or
connecting signals to it.</p>
<p>The static <a href="qerrormessage.html#qtHandler">qtHandler</a>() function installs a
message handler using <a href="qtcore.html#qInstallMsgHandler">qInstallMsgHandler</a>() and
creates a QErrorMessage that displays <a href="qtcore.html#qDebug">qDebug</a>(), <a href="qtcore.html#qWarning">qWarning</a>() and <a href="qtcore.html#qFatal">qFatal</a>() messages. This is most useful
in environments where no console is available to display warnings
and error messages.</p>
<p>In both cases QErrorMessage will queue pending messages and
display them in order, with each new message being shown as soon as
the user has accepted the previous message. Once the user has
specified that a message is not to be shown again it is
automatically skipped, and the dialog will show the next
appropriate message in the queue.</p>
<p>The <a href="dialogs-standarddialogs.html">Standard Dialogs</a>
example shows how to use QErrorMessage as well as other built-in Qt
dialogs.</p>
<p class="centerAlign"><img src="images/qerrormessage.png" /></p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QErrorMessage" />QErrorMessage.__init__ (<i>self</i>, <a href="qwidget.html">QWidget</a>&#160;<i>parent</i>&#160;=&#160;None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Constructs and installs an error handler window with the given
<i>parent</i>.</p>


<h3 class="fn"><a name="changeEvent" />QErrorMessage.changeEvent (<i>self</i>, <a href="qevent.html">QEvent</a>&#160;<i>e</i>)</h3><p>Reimplemented from <a href="qwidget.html#changeEvent">QWidget.changeEvent</a>().</p>


<h3 class="fn"><a name="done" />QErrorMessage.done (<i>self</i>, int)</h3><p>Reimplemented from <a href="qdialog.html#done">QDialog.done</a>().</p>


<h3 class="fn"><a name="qtHandler" /><a href="qerrormessage.html">QErrorMessage</a> QErrorMessage.qtHandler ()</h3><p>Returns a pointer to a <a href="qerrormessage.html">QErrorMessage</a> object that outputs the
default Qt messages. This function creates such an object, if there
isn't one already.</p>


<h3 class="fn"><a name="showMessage" />QErrorMessage.showMessage (<i>self</i>, QString&#160;<i>message</i>)</h3><p>This method is also a Qt slot with the C++ signature <tt>void showMessage(const QString&amp;)</tt>.</p><p>Shows the given message, <i>message</i>, and returns
immediately. If the user has requested for the message not to be
shown again, this function does nothing.</p>
<p>Normally, the message is displayed immediately. However, if
there are pending messages, it will be queued to be displayed
later.</p>


<h3 class="fn"><a name="showMessage-2" />QErrorMessage.showMessage (<i>self</i>, QString&#160;<i>message</i>, QString&#160;<i>type</i>)</h3><p>This method is also a Qt slot with the C++ signature <tt>void showMessage(const QString&amp;,const QString&amp;)</tt>.</p><p>This is an overloaded function.</p>
<p>Shows the given message, <i>message</i>, and returns
immediately. If the user has requested for messages of type,
<i>type</i>, not to be shown again, this function does nothing.</p>
<p>Normally, the message is displayed immediately. However, if
there are pending messages, it will be queued to be displayed
later.</p>
<p>This function was introduced in Qt 4.5.</p>
<p><b>See also</b> <a href="qerrormessage.html#showMessage">showMessage</a>().</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt&#160;4.9.1 for X11</td><td align="center" width="50%">Copyright &#169; <a href="http://www.riverbankcomputing.com">Riverbank&#160;Computing&#160;Ltd</a> and <a href="http://www.qtsoftware.com">Nokia</a> 2011</td><td align="right" width="25%">Qt&#160;4.8.0</td></tr></table></div></address></body></html>